Fourdrinier machine



Nov. 1, 1932. J. A. WHITE FOURDRINIER MACHINE Filed Bed. 31, 1931 4Sheets-Sheet 1 NOV. 1, 1932. J, w 1,885,164

FOURDRINIER MACHINE .Filed Dec. 31, 1951 4'Sheets'-Sheet 2 1932- J. AWHITE FQURDRINIER MACHINE Filed-Dec. 31, 19:51 4 Sheets-Sheet a Nov. 1,1932. J. A. WHITE 1,885,164

FOURDHINIER MACHINE Filed Dec. 31, 1931 4 SheetsSheet 4 JK W PatentedNov. 1, 1932 i T s PATENIOFFICE JOSEPH A; WHITE, P MELROSE PARK,PENNSYLVANIA, ASSIGNOR TO THE Moorm &

WHITE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENN-SYLVANIA FOURDRI1\TIER MACHINE Application filed December 31, 1931."Serial Nol 584,191.

My invention relates to certain improvementsin Fourdrinier paper makingmachines where the wire travels over guide rolls. This wire is anendless wire and quite long, and as it travels over the rolls it isliable to move to one side or the other of the rolls,

, Prior to my invention means has been pro vided for retaining the wirein its normal position. This means is actuated by the movement of a padwhich bears against one edge of the wire and through certain mechanism.One of the bearings of. the roll over which the wire travels will beshifted in one direction or the other to skew the roll very slightly andthe Wire passing over this skewed roll is broughtbackto its normalposition, after which the roll is returned to its normal position andwill not bemoved until the wire travels laterally to either sideofitsnor mal position. i e One object of my invention is to prevent the.grooving of-theupper surfaces ofthe suction boxes by the wire as ittravels over the boxes. V 1

U A further object of theinvention is to provide means forcontinuouslyshifting the wire laterally over the guide roll and suctionboxes to prevent the' wire traveling in one path, preventing:thegrooving .oflthe upper surfaces of theIsuction boxes.

- A still further object is to provide means by which the continuouslaterally shifting mechanism will actin conjunctionwiththe wireadjusting mechanism so that the wire will travelin. thepath dictated thecontinuous shifting mechanism, the continuous shifting mechanism skewingthe roll through the wire adiusting mechanism. i 1 These objects Iattain in. the following manner, reference being had to the accompanyingdrawings. in which: f c p Fig.1is a plan view of sufficient-of aFourdrinier machine to illustrate my invention, the gear box cover beingremoved:

Fig. 2-isa-transverse sectional view on the line 2-2. Fig. 1, the gearboxbeing broken awayto show thegearing; 7

Fig. '3 is a side view lookingi-n the direction of the arrow 3, Fig. 1,and showing one of the suction boxes;

ing from the slide, sothat as the nut is turned Fig. 4 is a sectionalelevation onthe line i" 44, Fig.1; ,7

Fig. 5 is a view of one side of the machine, shplwing the mechanism forskewing the guide 0 i V Fig. 6 is a sectional view on. the line 6-6,Fig. 5; r

Figs. 7 and 8am diagrams showing the action of the continuous shiftingmechanism for the wire; and; 1-1;" j

Fig. 9 is a view of a modification of the invention.

A Referring tofthe' drawingsz-jl l are the side frames ofaFourdrinierpaper making machine. 2 is the guide roll at the delivery endof the machine and 3 is one of a series of when theoppos'ite endof theroll is skewed by mechanism described hereinafter, the bearing6-will'turn on its pivot. 8 is a bearing for the trunnion 4, which ispivotally mounted on a slide 9. Theslide 9 is adapted to a slideway-lOaon the upper surface of the frame 10. Fixed in the frame 10 is a screwthreaded 'bar 11. On this bar 11 is a nut 12, having-helical gearteeth14 on its periphery, whichmesh with the teeth of a helical gear wheel13a 0n a shaft 13, Fig.6. 1 The shaft is mounted in bearings 15-15a,carried by the slide: 7 The bearing 15 is an'integral part of the slide9, andthe bearing 15a is secured to'an apron 18 depending from the outerside of the slide. By this construction the shaft moves with the slide.The nut 12 is located between two cheek pieces 9a dependon the screw rodthe slide will travel on the slide-way and skew the roll. The skewing ofthe roll in one direction or the other will shift the screen as itpasses over the guide roll, and the wire will travel over the roll shaft13 is a ratchet wheel 17 and on a rocker i in the given path until itagain moves out of 19 pivotally mounted on the shaft is a double pawl20, the teeth of which are arranged to mesh with the teeth of theratchet wheel 17. The rocker 19 is actuated by the roll 2, through themedium of a crank pin 21 on a disk 22 on the end of the roll in thepresent instance, and this crank pin extends into a bearing 25 on an arm23 pivoted at 24 to the rocker 19. As the roll rotates the rocker 19will rock on its pivot through the arm 23. The double pawl 20 is looselypivoted in the rocker 19 and has an arm 26 on which is a head 27,through which passes a rod 28. On each side of the head is a coil spring29, held in tension byadjustable collars on the rod 28, thus yieldinglyholding the head 27 in a normal central position.

Therod 28 is adjustably secured to a block 31 swivelled in an arm 32projecting from a vertical hub 33 mounted on a fixed spindle 34projecting upwardly from a bracket 35 secured to the frame 10, the upperend of which forms the slideway 10a. On the hub 33 is an arm 36, on theouter'end of which is a post 37 and on this post is adjustably mounted abearing 38 for a rod 39; This arm has an eye 40 which encircles a rod41, pivoted to a collar 42 on a transverse sliding bar 43, which extendsfrom one side of the machine to the other. At the left side of themachine the bar is reduced and passed through a bearing 44 on thebracket 35.

On the rod 41 on each side of the eye 40 of the rod 39 are adjustablecollars 45. On the upper end of the rod 41 is adjustably mount- 'anism,which I will now describe, which will shift the wire into differentpredetermined positions, but this shifting will not in any mannerinterfere with the automatic mechanism for returning the wire to thenormal predetermined position.

The bar 43 extends from one side of the machine to the other and securedto the bar is ahead 47 which spans a bearing 48 mounted on the frame 54.The head has an extension 49 in which is a vertical slot50. 51

is a shaft having an eccentric pin 52 which bearings inthe frame 54 andon the shaft 57 is a gear wheel 58, which meshes with the pinion 59,loose on the shaft 51, and secured to the hub of the pinion is a Wormwheel 60, which meshes with a worm 61 on a shaft 62, having itsbearingsin the upper portion of the frame 54. On the end of the shaft is apulley 63, around which passes a spring belt 64, which in turn passesaround a pulley 65 on the reduced portioni66. of the trunnion '5 of theroll 2. By the above described mechanism the eccentric pin 52 is drivenfrom the roll 2. The gear reduction is such that the pin makes a fullrevolution about every seven minutes in the'present instance, but themovement will depend upon the travel of the moving wire over the guideroll 2. As the transverse bar. is slowly moved longitudinally by the pin52 it shifts the fulcrum 42a of the arm 41 and as the pad 46 is restingagainst the edge of the wire the rod 39 is moved, and this movementskews the roll, causing the wire to positively move laterally over theroll and suction boxes, and if the wire should move out of the givenpath as dictated by the reciprocating rod, then the rod 39 will be movedby the pad 46 and its arm to either skew the roll further or reduce theskewing, depending upon the abnormal lateral movement of the wire, thuscorrecting'thetravel of the wire and causing it to reassume its positionon the roll as dictated by the reciprocating rod. 7

While I have shown the mechanism for positively moving the wirelaterally as driven from the guide roll, it may be driven by a separatemotor or from other parts of the paper-making machine without departingfrom my invention, the main idea being to rotate the crank shaft atagiven speed so that the wire will be positively and continuouslyshifted over the surface of the guide roll and the suction boxes.

In Fig. 9 a modification is shown, in which the shaft 50aon which is acrank pin 51a, is driven by an electric motor. The rod 43a is a shortshaft mounted in bearings 44a-on which is a collar 42 carrying thefulcrum 42a of the arm 41, carrying the pad 46. r

r I claim::

1. The combination in aFourdrinier papermaking machine, of suctionboxes; a guide roll; an endless wire passing over the suction boxes andguide roll; a pad bearing against the edge of the wire; means forskewing the roll to shift the wire laterally on the roll; and positivemeans connected .to the pad and the said shifting means for positivelymoving the mechanism to continuously shift the wire on the roll. I

2. The combination in aFourdrinierpapermaking machine, of suction boxes;a guide roll; an endless wire passingover the'suction boxes and guideroll; a pad bearing against the edge of the wire; means for skewing theroll to shift the wire laterally on the lit) roll; and positive meansconnected to'the V pad and the said shifting means for positively movingthe mechanism to continuously shift the wire on the roll, the firstmentioned 1 means also acting independently of the pos1- tive mechanismto align the wire on the roll in the event of its moving independentlyof the positive mechanism to one side or the other of its path.

3. The combination in a Fourdrinier paper-making machine, of a guideroll; an end-' less wire arranged to pass over the guide roll; a padbearing against the edge of the wire; and mechanism for skewing theroll; mechanism for imparting a definite lateral move-:.

ment to the wire; a pad bearing against the edge of the wire pivotallyconnected to the mechanism for positively giving the wire a continuouspositive lateral reciprocating motion and also pivotally connected somedistance from the first-mentioned pivot with the mechanism for skewingthe roll.

4. The combination of a guide roll for a Fourdrinier paper-makingmachine, of an endless Wire passing over the roll; an arm having a padbearing against one edge of the wire; a rod extending across the maschine, to which the lower end of the arm is pivoted; means for slowlyreciprocating the rod; a sliding bearing for the roll; means for movingthe bearing to one side or the other of the center line through the rollwhen it is in its normal central position; a rod pivotally connected tothe pad arm, some distance from the pivot connecting it to thetransversely movable rod; a double pawl connected to the last-mentionedrod; a ratchet wheel with V which the pawl engages; and means betweenthe ratchet wheel and the sliding bearing for moving the bearing to skewthe roll when the ratchet wheel is turned in either direction by thepawl, so that the wire has a positive reciprocating movement on the rollthrough the medium of the transverserod, and any abnormal movement ofthe wire on the roll being corrected by increasing or diminishing theskewing of the roll.

5. The combination in a guide roll; an endless wire on the guide roll;an arm having a pad bearing against the wire; a movable bearing for oneend of the roll; means for shifting the bearing to one side or the otherfrom its normal center, said means being connected to the pad arm; areciprocating transverse bar also pivotally connected to the pad arm; ahead on one end of the rod, said head having'a vertical slot there- Iin; a shaft having an eccentric pin extending into the slot; and meansfor driving the shaft from the roll, so that the guide roll'will, V beskewed to one side or the other of its nor- 7 7 mal center line by thecontinuous recipro cation of the transverse bar.

JOSEPH A. WHITE.

